GB404011A - Improved magnetic compositions containing principally iron and cobalt - Google Patents

Improved magnetic compositions containing principally iron and cobalt

Info

Publication number
GB404011A
GB404011A GB19104/32A GB1910432A GB404011A GB 404011 A GB404011 A GB 404011A GB 19104/32 A GB19104/32 A GB 19104/32A GB 1910432 A GB1910432 A GB 1910432A GB 404011 A GB404011 A GB 404011A
Authority
GB
United Kingdom
Prior art keywords
per cent
vanadium
sheets
annealed
quenching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB19104/32A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB404011A publication Critical patent/GB404011A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C19/00Alloys based on nickel or cobalt
    • C22C19/07Alloys based on nickel or cobalt based on cobalt

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

Magnetic articles are made from an alloy containing 30-70 per cent of iron, and 70-30 per cent of cobalt, in which is incorporated 0.5-4 per cent of vanadium, or up to 3 per cent of manganese, or both vanadium and manganese, and which, preferably after limited mechanical working as by hot rolling, is annealed at about 850 DEG C., or higher, and cooled rapidly as by quenching in brine and ice. The alloy, after casting, is maintained at 1000 DEG C. for 3 hours, and rolled at 1000 DEG C. to a thickness of about 0.1 inch, with a reduction of 0.025 inch per pass, and an interval of 5 minutes after every two passes, to restore the temperature. Sheets containing not more than about 2 per cent vanadium are annealed at about 900 DEG C. for about 1 minute and quenched, the heat treatment and quenching being repeated three times in some cases. To sheets of higher vanadium content an anneal at about 850 DEG C.-950 DEG C. and a single quench are applied. From the heat-treated sheets rings and other shapes may be punched, and thin strips may be rolled for making stampings for small receiver diaphragms. Thin tape rolled to 0.006 inch thick or less may be quenched in air. To develop the magnetic properties, the sheets are pot annealed for 1 hour at about 900-1100 DEG C. in an electric furnace, if desired in vacuo or in hydrogen, and cooled in the furnace. A further re-heating to about 600 DEG C. for 15 minutes and quenching in air may produce a further improvement.
GB19104/32A 1931-08-14 1932-07-06 Improved magnetic compositions containing principally iron and cobalt Expired GB404011A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US404011XA 1931-08-14 1931-08-14

Publications (1)

Publication Number Publication Date
GB404011A true GB404011A (en) 1934-01-08

Family

ID=21910784

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19104/32A Expired GB404011A (en) 1931-08-14 1932-07-06 Improved magnetic compositions containing principally iron and cobalt

Country Status (1)

Country Link
GB (1) GB404011A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE905026C (en) * 1942-01-23 1954-02-25 Westinghouse Elekctric Corp Process for the heat treatment of a magnetizable material
US3634072A (en) * 1970-05-21 1972-01-11 Carpenter Technology Corp Magnetic alloy

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE905026C (en) * 1942-01-23 1954-02-25 Westinghouse Elekctric Corp Process for the heat treatment of a magnetizable material
US3634072A (en) * 1970-05-21 1972-01-11 Carpenter Technology Corp Magnetic alloy

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